This legendary bank's stock just got a lot cheaper. But there's a catch. Toronto-Dominion Bank (TD -0.88%) -- more commonly referred to as TD Bank -- has been a terrific longterm investment. During the past 30 years, the shares have increased in value by more than 3,300%. The S&P 500, for comparison, rose in value by just 1,400% during the same time period. More recently, however, TD Bank stock has lagged behind the market. During the past three years, the shares have essentially been little changed while b ...